Tremec Transmission Blocker

3. This simple synchronizer, or more accurately, “blocker ring” kit also includes a small assortment of other parts and can be purchased for around $100. This kit came included with the transmission, as the previous owner thought that was all that was needed. Not so much. There are aftermarket carbon-fiber-lined synchronizer kits that can be substituted. They tout faster shifts at higher rpm than the original components.